src/exporting/json/json.c
// SPDX-License-Identifier: GPL-3.0-or-later
#include "json.h"
/**
* Initialize JSON connector instance
*
* @param instance an instance data structure.
* @return Returns 0 on success, 1 on failure.
*/
int init_json_instance(struct instance *instance)
{
instance->worker = simple_connector_worker;
struct simple_connector_config *connector_specific_config = callocz(1, sizeof(struct simple_connector_config));
instance->config.connector_specific_config = (void *)connector_specific_config;
connector_specific_config->default_port = 5448;
struct simple_connector_data *connector_specific_data = callocz(1, sizeof(struct simple_connector_data));
instance->connector_specific_data = connector_specific_data;
instance->start_batch_formatting = NULL;
instance->start_host_formatting = format_host_labels_json_plaintext;
instance->start_chart_formatting = NULL;
if (EXPORTING_OPTIONS_DATA_SOURCE(instance->config.options) == EXPORTING_SOURCE_DATA_AS_COLLECTED)
instance->metric_formatting = format_dimension_collected_json_plaintext;
else
instance->metric_formatting = format_dimension_stored_json_plaintext;
instance->end_chart_formatting = NULL;
instance->variables_formatting = NULL;
instance->end_host_formatting = flush_host_labels;
instance->end_batch_formatting = simple_connector_end_batch;
instance->prepare_header = NULL;
instance->check_response = exporting_discard_response;
instance->buffer = (void *)buffer_create(0, &netdata_buffers_statistics.buffers_exporters);
if (!instance->buffer) {
netdata_log_error("EXPORTING: cannot create buffer for json exporting connector instance %s", instance->config.name);
return 1;
}
simple_connector_init(instance);
if (uv_mutex_init(&instance->mutex))
return 1;
if (uv_cond_init(&instance->cond_var))
return 1;
return 0;
}
/**
* Initialize JSON connector instance for HTTP protocol
*
* @param instance an instance data structure.
* @return Returns 0 on success, 1 on failure.
*/
int init_json_http_instance(struct instance *instance)
{
instance->worker = simple_connector_worker;
struct simple_connector_config *connector_specific_config = callocz(1, sizeof(struct simple_connector_config));
instance->config.connector_specific_config = (void *)connector_specific_config;
connector_specific_config->default_port = 5448;
struct simple_connector_data *connector_specific_data = callocz(1, sizeof(struct simple_connector_data));
instance->connector_specific_data = connector_specific_data;
#ifdef ENABLE_HTTPS
connector_specific_data->ssl = NETDATA_SSL_UNSET_CONNECTION;
if (instance->config.options & EXPORTING_OPTION_USE_TLS) {
netdata_ssl_initialize_ctx(NETDATA_SSL_EXPORTING_CTX);
}
#endif
instance->start_batch_formatting = open_batch_json_http;
instance->start_host_formatting = format_host_labels_json_plaintext;
instance->start_chart_formatting = NULL;
if (EXPORTING_OPTIONS_DATA_SOURCE(instance->config.options) == EXPORTING_SOURCE_DATA_AS_COLLECTED)
instance->metric_formatting = format_dimension_collected_json_plaintext;
else
instance->metric_formatting = format_dimension_stored_json_plaintext;
instance->end_chart_formatting = NULL;
instance->variables_formatting = NULL;
instance->end_host_formatting = flush_host_labels;
instance->end_batch_formatting = close_batch_json_http;
instance->prepare_header = json_http_prepare_header;
instance->check_response = exporting_discard_response;
instance->buffer = (void *)buffer_create(0, &netdata_buffers_statistics.buffers_exporters);
simple_connector_init(instance);
if (uv_mutex_init(&instance->mutex))
return 1;
if (uv_cond_init(&instance->cond_var))
return 1;
return 0;
}
/**
* Format host labels for JSON connector
*
* @param instance an instance data structure.
* @param host a data collecting host.
* @return Always returns 0.
*/
int format_host_labels_json_plaintext(struct instance *instance, RRDHOST *host)
{
if (!instance->labels_buffer)
instance->labels_buffer = buffer_create(1024, &netdata_buffers_statistics.buffers_exporters);
if (unlikely(!sending_labels_configured(instance)))
return 0;
buffer_strcat(instance->labels_buffer, "\"labels\":{");
rrdlabels_to_buffer(host->rrdlabels, instance->labels_buffer, "", ":", "\"", ",",
exporting_labels_filter_callback, instance,
NULL, sanitize_json_string);
buffer_strcat(instance->labels_buffer, "},");
return 0;
}
/**
* Format dimension using collected data for JSON connector
*
* @param instance an instance data structure.
* @param rd a dimension.
* @return Always returns 0.
*/
int format_dimension_collected_json_plaintext(struct instance *instance, RRDDIM *rd)
{
RRDSET *st = rd->rrdset;
RRDHOST *host = st->rrdhost;
if (instance->config.type == EXPORTING_CONNECTOR_TYPE_JSON_HTTP) {
if (buffer_strlen((BUFFER *)instance->buffer) > 2)
buffer_strcat(instance->buffer, ",\n");
}
buffer_sprintf(
instance->buffer,
"{"
"\"prefix\":\"%s\","
"\"hostname\":\"%s\","
"%s"
"\"chart_id\":\"%s\","
"\"chart_name\":\"%s\","
"\"chart_family\":\"%s\","
"\"chart_context\":\"%s\","
"\"chart_type\":\"%s\","
"\"units\":\"%s\","
"\"id\":\"%s\","
"\"name\":\"%s\","
"\"value\":" COLLECTED_NUMBER_FORMAT ","
"\"timestamp\":%llu}",
instance->config.prefix,
(host == localhost) ? instance->config.hostname : rrdhost_hostname(host),
instance->labels_buffer ? buffer_tostring(instance->labels_buffer) : "",
rrdset_id(st),
rrdset_name(st),
rrdset_family(st),
rrdset_context(st),
rrdset_parts_type(st),
rrdset_units(st),
rrddim_id(rd),
rrddim_name(rd),
rd->collector.last_collected_value,
(unsigned long long)rd->collector.last_collected_time.tv_sec);
if (instance->config.type != EXPORTING_CONNECTOR_TYPE_JSON_HTTP) {
buffer_strcat(instance->buffer, "\n");
}
return 0;
}
/**
* Format dimension using a calculated value from stored data for JSON connector
*
* @param instance an instance data structure.
* @param rd a dimension.
* @return Always returns 0.
*/
int format_dimension_stored_json_plaintext(struct instance *instance, RRDDIM *rd)
{
RRDSET *st = rd->rrdset;
RRDHOST *host = st->rrdhost;
time_t last_t;
NETDATA_DOUBLE value = exporting_calculate_value_from_stored_data(instance, rd, &last_t);
if(isnan(value))
return 0;
if (instance->config.type == EXPORTING_CONNECTOR_TYPE_JSON_HTTP) {
if (buffer_strlen((BUFFER *)instance->buffer) > 2)
buffer_strcat(instance->buffer, ",\n");
}
buffer_sprintf(
instance->buffer,
"{"
"\"prefix\":\"%s\","
"\"hostname\":\"%s\","
"%s"
"\"chart_id\":\"%s\","
"\"chart_name\":\"%s\","
"\"chart_family\":\"%s\","
"\"chart_context\": \"%s\","
"\"chart_type\":\"%s\","
"\"units\": \"%s\","
"\"id\":\"%s\","
"\"name\":\"%s\","
"\"value\":" NETDATA_DOUBLE_FORMAT ","
"\"timestamp\": %llu}",
instance->config.prefix,
(host == localhost) ? instance->config.hostname : rrdhost_hostname(host),
instance->labels_buffer ? buffer_tostring(instance->labels_buffer) : "",
rrdset_id(st),
rrdset_name(st),
rrdset_family(st),
rrdset_context(st),
rrdset_parts_type(st),
rrdset_units(st),
rrddim_id(rd),
rrddim_name(rd),
value,
(unsigned long long)last_t);
if (instance->config.type != EXPORTING_CONNECTOR_TYPE_JSON_HTTP) {
buffer_strcat(instance->buffer, "\n");
}
return 0;
}
/**
* Open a JSON list for a bach
*
* @param instance an instance data structure.
* @return Always returns 0.
*/
int open_batch_json_http(struct instance *instance)
{
buffer_strcat(instance->buffer, "[\n");
return 0;
}
/**
* Close a JSON list for a bach and update buffered bytes counter
*
* @param instance an instance data structure.
* @return Always returns 0.
*/
int close_batch_json_http(struct instance *instance)
{
buffer_strcat(instance->buffer, "\n]\n");
simple_connector_end_batch(instance);
return 0;
}
/**
* Prepare HTTP header
*
* @param instance an instance data structure.
* @return Returns 0 on success, 1 on failure.
*/
void json_http_prepare_header(struct instance *instance)
{
struct simple_connector_data *simple_connector_data = instance->connector_specific_data;
buffer_sprintf(
simple_connector_data->last_buffer->header,
"POST /api/put HTTP/1.1\r\n"
"Host: %s\r\n"
"%s"
"Content-Type: application/json\r\n"
"Content-Length: %lu\r\n"
"\r\n",
instance->config.destination,
simple_connector_data->auth_string ? simple_connector_data->auth_string : "",
(unsigned long int) buffer_strlen(simple_connector_data->last_buffer->buffer));
return;
}